atovsatrozTell them apart

Quick tell: ato is a noun, atroz is an adjective, so they fill different roles in a sentence.

Which to use

“ato” is a noun and “atroz” is an adjective - they look or sound alike but fill different roles in a sentence.

#1,326
“ato” frequency rank
#48,778
“atroz” frequency rank
50104
confusion score

Side-by-Side Comparison

Feature ato atroz
Definition processo de fazer algo; manifestação real e tangível que não tem piedade, ímpeto; bárbaro; cruel

Where the eye mixes ato and atroz

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. ato runs 3 letters (VCV) against atroz's 5 (VCCVC) - the length gap alone is often enough to separate them once you know to check it.

3 ch
ato
5 ch
atroz

Visual trap between ato and atroz

These two trip readers on the page rather than in the ear: ato is /ˈato/ ou /ˈatu/_(plural:) /ˈatos/, /ˈatus/ ou /ˈatuʃ/ while atroz is /ɐ.ˈtɾɔʃ/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 50104, derived from the frequency rank of both members and their visual similarity.

ato is recorded at frequency rank #1,326, classified as anoun, pronounced /ˈato/ ou /ˈatu/_(plural:) /ˈatos/, /ˈatus/ ou /ˈatuʃ/. atroz is at rank #48,778, tagged as anadj, pronounced /ɐ.ˈtɾɔʃ/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 50104, this pair ranks #14,873 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of ato vs atroz

Shared letters: aot. Private to "ato": -. Private to "atroz": rz.

"ato" · 3 letters · shape VCV  ·  "atroz" · 5 letters · shape VCCVC

Known mistypes of this pair

  • atrozartoz · atorz · atrozz · atrroz · atrzo · attroz · taroz

Frequently Asked Questions

Do "ato" and "atroz" mean the same thing in a sentence?
No - they are not even the same part of speech. "ato" is a noun and "atroz" an adjective, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "ato" vs "atroz" - which ranks higher?
"ato" is the more common of the two: it sits at frequency rank #1,326 in our Portuguese list, against #48,778 for "atroz". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "ato" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "atroz" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #14,873 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "ato" and "atroz" also get mixed up with nearby pairs, the highest-scored neighbour is "antro vs atroz". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #14,873 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list